OTraki 2 in 1 Mini Fan Dual USB 40 mm 3 Speeds Black for Case Cooling 1.6 x 0.4 Inches with Heat Sink Painted Metal Grid Ideal PS4, Router, TV Box

【2-in-1 40mm Dual Fan】This 4cm OTraki dual USB fan is compact and lightweight, ideal for tight spaces. Its square design allows for flat or standing installation. Powered by USB plug-and-play, the 2 connected fans work together for optimal heat dissipation. 【3 Adjustable Speeds】This 40mm fan has 3 speed levels (low, medium, high) specially designed to control the air flow. Speeds are 4500/5500/6500 RPM to suit your operating environment. 【Improved Cooling】A metal heatsink is added to the base of this mini USB fan to increase lower air circulation and lower the temperature of the device. A silicone heat sink is also included for optimal cooling efficiency. 【Safe and Durable】This PC fan is equipped with a front metal grille that protects your fingers and cables from blades. High quality double ball bearings ensure long life and consistent reliability. 【Wide Application】Size: 4 x 4 x 1 cm per fan. Ideal for cooling PC, laptop, TV box, receiver, phone, PS4, projector, router and hard drive. Plug into any USB port for instant cooling.